That's more than one hour after the hijacking:
8:13:31 a.m.: American Airlines Flight 11 last transmission from Boston Air Traffic Control: AAL11 turn 20 degrees right American Airlines Flight 11 responds: 20 right AAL11.A few seconds later the Controller asks: AAL11 now climb maintain FL350 [35,000 feet] Controller: AAL11 climb maintain FL350 Controller: AAL11 Boston. There is no response from American Airlines Flight 11. 11) 8:14 to 8:20 a.m.: American Airlines Flight 11 goes off course and is hijacked.
8:21 a.m.: Betty Ong, a flight attendant on American Airlines Flight 11, calls Vanessa Minter at American Airlines reservations from the seatback phone. "She said two flight attendants had been stabbed, one was on oxygen," said the manager on duty. "A passenger had his throat slashed and looked dead and they had gotten into the cockpit." She identifies the seats of the hijackers and confirms that the plane is descending.
If you're near Virginia maybe this is what you saw:
9:24 a.m.: NORAD orders the 1st Fighter Wing from Langley Air Force Base in Hampton, Virginia to scramble two, possibly three F-16 fighters. This time NORAD does not sit on this vital information for six minutes before notifying Langley AFB. Langley is 130 miles south of Washington D.C. and the Pentagon. The F-16 has a top speed of 1500 MPH.9:30 a.m.: Two maybe three F-16 Fighting Falcons code-named Huntress take off from Langley AFB headed at first toward at NYC. A couple of minutes into their mission, according to General Haugen "A person came on the radio and identified themselves as being with the Secret Service" and said, "I want you to protect the White House at all costs." The F-16s laid in a new course and vectored to Washington D.C.